Seat-cutting tool



G. A. SAGER.

SEAT CUTTING TOOL. APPLICATION FILED AUG.I9. I920.

1,435,502. Patented Nov. 14, 1922.

1 & I

2/ J0 Z0 I a? W llllllli f \IIIIIIIIlI/I INVENTOR. I

Arm?

- ing the manner in which the cutter sections Patented Nov. 14., 1922.

' lv E GEORGE; SAG ER' F ntzsuy'ymw'yoek,

- snAr-onr'rme roon i leplicaticn filed eu st 19,1920. sees in). 4045350;

To all whomit m co ce n: a Be it known that I, GEORGE A. SA GER, a citizen or"; the United States, residing et Albany, in the county of Albany andSta-teof New York, have invented certain new and useful Improvements in Seat-Cutting Tools, of which the following is a specification. L,

This invention relates to [an improved tool forcutting a seet at 'the inner endof plug opening through boiler beck head whereby a boiler plug of the type. sho vn inmy copending eppliciation filed Aug. Serial No. 404,659, may be employed upon the boiler. I y y The invention has a s. one of its lprincip'al objects to provide zt tool which be successfully operated at the outer side of the back head I I a v- 4 1 A further object of the i nvention to. provide a tool having a cutter 10f such construction that the cutter may he readilyinserted or removed. through. the" plug opening in'theha'ck headu i And the inventionhas. asfa stillj further object to provide a tool which will, without chattering, form a. smooth annular beveled seat at the inner end of theplug opening.

ther and incidental objects will appear hereineftern,

In the drawings: c Figure 1 is a side elevation of my improved tool, thetool beingarrenged in position upon a boiler-backhead,

. F1gure2 is a longitudinal I e n ectional. view taken medially through the tool, I, i V t Figure 3 is an end elevation showin'gthe cutter in. detail,,..' v v a I I e I Figure ,4 is a face View of one ofthe cutter sections, 1 j a Figurej is a fragmentary section-s 0W are inserted through the plug opening in the boiler hackfhead, and

y ,Fiiei I i d t i e 'sn t v f s w thevvrench employed in separating the cut ter sections. ,t 1

Q As previouslyv intimated, the. tool hfthe present invention" is particularly designed toruse in cuttinga beveled seat at the inner end of a, plug opening-through the back head of a locomotive b'oiler .s 'o -,that afpl'ug of the type v fsh'oWn in m co-pending ,application previously identified, may heemnloyed upon $1 b e 1. 51 6 it si l i it Q Tk po he b ibe k. hea free the n e side thereof, it acc'or dingly becomes neg s to providev a the cutter vvhich may be readilyinserted through the plug open ng in the back head and then brought into ,position'for cutting the seat at inner 1 end of said openiug. Further asQ vvill-be seen, it is also necessary that the cutter may he 7 readily removed through the plug 0pm ingafter the operation of'cutting the seat has loeen completed. I

lnlcarrying the invention into "efiect, .1 employ aishell orvbody lOradially enlarged atits lower end and provided Withspeced depending foot lugs 11. Freely journajled throughthe she-ll is a teed screvvorflloar 12 I provided at. its inner fiend with e reduced ex-v tension 13 defining an 'annularshoulder 14 at the junctionv of said extension vviththe body of the screw. Mounted upon saideX- tension is thecutter employed, This cutter is formed of ,rn'ating oblong seetionsmv hich,

for, convenience have been indicated at 15 i and. 16 respectively, the section 16 heing pro is thus reinforc'edQand providedixvithga con- .YCX lower face. "Through outer endof it'l l extension 13 is en igela pin; 17 remov- "ably securing; the cutter sections upon the extension. -Fo rmed on the upper? sides. of e the sections at their ends are arcuatesbeveled l'cutting faces 18 and formed theconfronting sides of the sections are anedial transverse channels .1 9, the gchannel of each sectionnheingedejoted to lreceive the intermedia-t e portion'iof the other section Con c se ue uy as best. shown in' Fi ures "the sectionsmayloe hroughttogetherendinterloc'rked in[assembled relation extending" 'at 95 substantially right angles to each otherwhen Y the cutting faces18 ofthe sections 'Will .:in I

effect, provide an annular cutting surface.

Itis now tehe ohserved that the extension 13 is provided-with; a right hand thread the cuttersection ,15' threaded to engage .thefthreadeof theextension while the cutter Loosely t me feed screw is a thrustytvasherQfO seating section 16 is loosely fitted upon the: extenvvith e longitudinalieh annel inLW-hibh engages v feather 22Veeuplingfthecoller vvith fsaid nut and, as will be observed, the nut is pro-' vided with an annular series of spaced openings in which a suit-able tool may be selectively engaged for rotating the nut. Formed on the feed screw at its outer end is i a squared terminal 26 with which a wrench or ratchet may be engaged for rotating said SCI'GW.

In order that the operation of my improved tool may be accurately understood I have, in the drawings, shown the device in connection with the back head 27 of a locomotive boiler. proved plug, as shown in my co-pending application, the back head is first i'ormed with a circular plug opening 28 therethrough. The tool of the present invention is then employed to form a beveled seat at the inner end of this opening. To accomplish this operation, the cutter section 15 is, as shown in Figure 5, first threaded to the outer end of the extension 13 of the feed screw when the cutter section 16 is then' moved away from the section 15 so that the section 15 may, as also suggested in this figure, be inserted through the opening 28 in. the back head.

This done, the feed sc'rewis rocked to insert the section16 of the cutter through said opening in a similar manner. By manually pulling outwardly upon the feed screw until the section 16 contacts the inner side of the back head at the opening 28, interlocking with the section 15 of the cutter, the feed screw may then be rotated clockwise for threading the cutter section 15 inwardly upon the extension 13 of the feed screw until, as shown in Figures 1 and 2, the section 16 of the cutter is jammed against the shoulder '14. The shell 10 is then positioned over. the opening 28 at the'outer side of the back head for centering the cutter with respect to said opening and the feed nut adjusted for binding the cutter against the rim of the opening at its inner end. Consequently,'as will be seen, a wrench or ratchet may then be applied tothe terminal 260i the feed screw for rotating this screw and revolving the cutter to form a beveled seat at the inner end of the opening, the nut 24 being, of course, adjusted as desired to feed the cutter to the work. Since, as previously noted, the beveled cutting faces of the cutter sections will, when the cutter sections are assembled, form practically a continuous annular cuttingsurface, chattering of the cutter will be eliminated while the cutter will operate to form a smooth beveled seat at the inner end of the opening through the back head,- As

To accommodate my imthe cutting operation progresses, oil may be applied to the cutting faces of the cutter through the openings between the foot lugs 11 ofthe shell 10 and, of course, the progress of the Work may also be observed through these openings. To remove the tool, the feed nut 24 is first loosened and in orderv to tacilitateseparation of the sections of the cutter I provide, as shown in Figure 6, a wrench 29. The shank of this wrench is curved laterally at its inner end portion and is provided with a depending head 30. After loosening the feed nut 24, the shank of the wrench 29 is inserted through one of the openings between the foot lugs 11 of the shell and the head 30 of the wrench engaged in one of the angles between the .projecting end portions of the cutter sections. Consequently, the cutter section 15 may then be readily held stationary so that the feed screw 12 may be rotated counter-clockwise for threading said sectionto the outer end of the extension 13. Then, by moving the cutter section 16 inwardly away from the cutter section 15 the feed screw may be rocked for withdrawing first the section 16 and thenthe section 15 through the opening in the back head and releasing the tool.

Having thus described the invention, what I i is claimed as new is 5'v v 1. A. tool for forming a plug seat at the inner end of a boiler sheet opening including'a feed screw, means engageable with the outer side of the sheet for supporting the screw, and a cutter carried by the screw and engageable withthe peripheryof the opening at the inner side of the sheet, the cutter being formed of interlocking sections.

2. A tool for forming a plug seatfatthe T inner end of a boiler sheet opening including a feed screw, means engageable with. the outer. side of the sheet for supporting the screw, and a cutter carried by the screw and engageable with the periphery of the opening at the inner side of the sheet, the cutter being formed of interlocking separable sec-' tions individually removable through said opening. r

'3. A tool for forming a plug seat atthe inner end of a boiler sheet opening including a feed screw, means engageable with the. outer side of the sheettor supportingthe screw, and a cutter mounted upon thescrew and engageable with the periphery of said opening at the inner side of the sheet, the cutter being formed of interlocking sections one loose upon the screw and another a plug seat at the 1 of said opening at the inner side of the sheet, the cutter being formed of interlocking sections one loose upon the extension and the other threaded thereon. I

5. A seat cutting tool including a bar,

and a cutter carried by the bar and formed of separable sections, one of the sections being loose on the bar and another of said sec -10 tions being engaged-directly With the bar first section interlocking therewithl 6. A seat. cutting tool including a of crossed oblong interlocking separable sec tions provided at their encls with Working' faces, j v ,1

In testilnon NVhBIBOfI aflix my signature. GE RGE A SAGER.

and rotatablyztdjn'stable thereon the a means for 'operatively supporting the'barr,

and a, cuttercarried by the bar and formed, means for operatively supporting the bar, 

